M37735S4BFP Datasheet, PDF (14/36 Pages) Mitsubishi Electric Semiconductor – 16-BIT CMOS MICROCOMPUTER

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MITSUBISHI MICROCOMPUTERS
M37735S4BFP
16-BIT CMOS MICROCOMPUTER
As shown in Table 3, 1 output can be stopped with the signal
output disable selection bit = “1”. In this case, write “1” to the port P42
direction register.
Table 1 shows the relationship between the CNVss pin input level
and the processor mode.
Table 1. Relationship between CNVss pin input levels and processor
mode
CNVss
Mode
Description
Vcc
• Microprocessor Microprocessor mode upon
starting after reset.
Table 2. Relationship between access addresses and chip-select signals CS0 to CS4
Chip-select
signal
____
CS0
____
CS1
____
CS2
Area
The first half of bank 0016 except
internal memory area
The latter half of bank 0016 except
internal memory area and banks
0116 to 0316.
Banks 0416 to 0716
____
CS3
Banks 0816 to 0B16
____
CS4
Banks 0C16 to 0F16
Access address
Microprocessor mode
00 088016
to
00 7FFF16
00 800016
to
03 FFFF16
04 000016
to
07 FFFF16
08 000016
to
0B FFFF16
0C 000016
to
0F FFFF16
Table 3. Function of signal output disable selection bit CM6 (bit 6 of oscillation circuit control register 0)
Processor mode
Pin
___
RDE,
___
WEL, WEH
Microprocessor mode
___
RDE
Function
CM6 = “0”
___ ___ ___
RDE, WEL, WEH are output when the
internal/external memory area is accessed.
After WIT/STP instruction is executed,
“H” is output.
CM6 = “1”
___ ___ ___
RDE, WEL, WEH are output only when the
external memory area is accessed.
“L” is output after WIT/STP instruction is
executed
∗ Standby state selection bit (bit 0 of port
function control register) must be set to “1”.
“H” or “L” is output. (Contents of P42 port
1
Clock 1 is output independent of 1
latch is output.)
output selection bit.
∗ Port P42 direction register must be set to
“1”.
Note. Functions shown in Table 3 cannot be emulated with a debugger. For the oscillation circuit control register 0 and port function control
register, refer to Figures 64 and 11 in data sheet “M37735MHBXXXFP”, respectively.
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